IDirectDrawSurface Interface Method Groups
Applications use the methods of the IDirectDrawSurface interface to create DirectDrawSurface objects and work with system-level variables. The methods can be organized into the following groups:
Allocating memory Initialize
Attaching surfaces AddAttachedSurface
Blitting Blt
Color keys GetColorKey
Device contexts GetDC
Flipping surfaces Flip
IUnknown AddRef
Locking surfaces Lock
Miscellaneous GetDDInterface
Overlays AddOverlayDirtyRect
Status GetBltStatus
Surface capabilities GetCaps
Surface clipper GetClipper
Surface description GetPixelFormat
Surface palettes GetPalette
All COM interfaces inherit the IUnknown interface methods, which are listed in the "IUnknown" group above. These three methods allow additional interfaces to be added to the DirectDrawSurface object without affecting the functionality of the original interface.